Saw-rim adjuster.



N. H. STONE.

' SAW RIM ADJUSTER.

APPLlcATIoNflLEn-MAH.1915.

1,155,966. Patented 001D. 5., 1915.v

2 SHEETS-SHEET l.

l I1 'N N. H. STONE.

SAW RIM ADJUSTER.

APELlcATloM FILED MAY4.1915.

1,155,966. Patented 001;. 5, 1915.

`*2 SHEETS-SHEET 2.

i@ l gym' f IUmm/wey '-NORMANHENRY STONE, or GAirYvinLE, Louisiana..

i,isaece.

To all whom t mayconcem:

B it knownthat I, ,NORMAN H- STONE, a

i citizen ofthe United States, and a resident l indicate corresponding parts in all the views, and in whichof Garyville, in the parishof St. John the Baptist and State of Louisiana, have 1nvented a new and'mproved Saw- Rim Adjuster, of which-:the following is a full,

clear, and exact description. t

This invention relates to saw mill appliances and has particular reference to Ameans for treatingxband or circular saws to prevent damage thereto such as buckling o r cracking along their backs or alongy the throats of their teeth. y'

lAmong the objects of the invention, therefore, is to provide ,anx improved device'for to be employed as means for setting the teeth of a saw, either separately or in conjunction with the vsaw straightening means.

The f foregoing and other objects of the invention will hereinafter be more fully described'and claimed andillustrated in the' drawings forming a partA of this specification in which like characters 'of' reference Figure 1 is a vertical one embodiment of the invention, showing the use thereof with traction rollers to stretch or expand the saw; Fig. 2 is a rear elevation of the same; Fig. 3 is a transverse sectionalv View on the line 3--3 of Fig. 1, showing the relation of a well known form of band saw thereto; Fig. 4 is aA side elevation of the same apparatus but. with a modified form of jaws applied for use upon the saw; Fig. 5 indicates in perspective the form of jaws shown in Fig. 4; and Fig. 6 is another modiication of jaws adapted to be Aused as guides fora saw while being op'- erated by other means.

The several parts of this device may be made of any suitable materials, and the relative sizes and proportions of the same, as well 'as the general design of the mechanism, may be varied to a considerable extent without -departing from the spirit of the invention hereinafter more fully described and claimed. A

In all forms of the invention I prefer to use a head or bracket 10 having a shank 11 as'an indication for any suitable means for securing the same to a bench or saw grinder Specification 'of Letters Patent. .j

sectional View of y Patented offesi, i915.

10 has a slotorfmouth 12 extending into its krear edge for the passage ofthe saw blade,

and adjacent oron opposite sides'of said mouth ,orlgpt12 `are blocks or jaws having parts or s "r'faces acting upon the opposite faces of the, saw blade `while the same is be-l n jblock is locked in position on the bracket operation upon ksaws for the purposes above' set forth, and also under certaln conditions and from displacement from the socket 14 b v a pair of face plates 19 of angular formation secured upon opp'osite faces lof the bracket by means of screws 2Q or their equivalent. j

Opposite the slot 12 from the traction roller 15 is a block 21 seated in a socket 22 and held from displacement therefrom by a pair of face plates 19 as described above in connection with the block 13. A roller 23 is journaled on an axle 24 in the block 21 and held in place by means of a cap 25. |The block 21 hasI shank26 extending therefrom 1n a. direction opposite from the roller 15 into a recess 2-7 and carries at its outer end a collar 28 between which. and the fixed plate 29 is a coi l`spring 30, the normal tendency of which. is to hold the roller 23 spacedv as far as possible from the roller 15 to facili- 'tate the introduction of the sawto the vslot or its removal therefrom. The plate 29 eX- tends transversely of the bracket 10 and is supported upon vthe upper edges of the adjacent plates 19. It will be understoodthat the rollers 15 and 23 are arranged substantially in the' same plane and opposite each other whereby their adjacent Contact points are adapted to bear on directly opposite points of the saw blade.

Pressure may be applied to the .movable block 21 by any suitable means such as shown in Figs. 1 and 2,'such means comprising a power screw 31 tapped into the outer or upper end of the bracket 10 in axial alinementlwith the shank 26. crank -or handle 32 is secured to said screw whereby, upon manipulating the handle the screw.

will bear forcibly upon the end of the shank,-

the spring andscausing the roller 23 to 'forcing it inwardly against the tension o f bear 'upon the saw opposite the roller 15 with sufficient force to stretch or expand the metal. With the saw applied as shown and described above, it may be fed longitudinally through the slot between the rollers either by the usual driving means for the saw or by force applied to the crank 1S, causing the roll'er 15 to act as a traction roller and cause the movement of the saw.

In Figs. 4 and 5 I show an application of the same mechanism in which the jaws 13' and 2l coperate with the bracket on opposite sides of the slot 12 as before described. Said blocks, however. in this form of the invention are not provided with rollers y but are formed with oppositel)Y arranged plane faces 13 and 2la respectively. which. acting upon opposite faces of the saw adjacent the throats` of the teeth. will expand the 'same as desired. (hie. of the blocks, however. is beveled away as indicated at 13". while the other is provided with Ia projection 21" serving to act upon a saw tooth and set the same coincidentally with the action of the iat faces as described. As in the previous modification. the movable. block has a shank E2G and a collar 12S for the accommodation of the spring 30.

- saw in this form of the device will be' operated step by step along the space or slot 12 and the hand operated screw 31 will be Copies of this patent may be obtained for The the combination of a bracket havinga transverse slot formed therein and a pair of sockets on opposite sides of the slot. a pair of blocks in said sockets. a pair of L-shaped plates secured to the bracket and einbracing each of said blocks preventing displacement thereof from the bracket. one of said blocks being rigidly heldv and the other being movable toward or from the stationary block. and saw sha-ping means carried by the blocks, substantiallv as set forth.

Q. In a device of the character set forth, the combination of a rigid bracket having atransverse slot therein and a pair of sockets ou opposite sides of the slot. a lixed jaw rigidly secured in one of said sockets. a movable jaw slidable in the other socket and having a shank secured thereto extending therefrom in a direction opposite from the iixed block. a collar carried by the end of the shank` a coil spring surrounding the shank and bearing at one end against the collar. face plates preventing lateral displacement of the blocks. a plate extending Titncsses t Penna' ll. BuANNrNoi-ui. (ino. D. Tuicnn.

ve cents each, by addressing the Commissioner of Patents, Washington, D. C." 

